Books about Greenhouses

Ortho's All About Greenhouses, Ortho Books

great resource
includes tips about orientation, drainage
comprehensive steps for examining sunlight on site
compares styles, materials: suitability for different climates, purposes
excellent build-it-yourself plans for each type

How to Build Your Own Greenhouse

good description of different types of greenhouses
good plan for soaker hoses
neat hydropinic plan
very comprehensive analysis of components, materials